Hare Joshua

SEC source: 0001214659-26-010733 · marketforms-73857.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,607,796

F1 · shares: Represents the award of time-based vesting Restricted Stock Units (RSUs).

F2 · balance_after: Includes RSUs subject to future vesting, including shares of Class B common stock underlying RSUs. Class B common stock is not registered, as further discussed in Footnote 3 below.

F3 · balance_after: Amount includes 462,808 shares of Class B common stock, which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B common stock have identical rights to holders of common stock, except that holders of Class B common stock are entitled to 5 votes for each share held of record. Each share of Class B common stock is convertible at any time, at the option of the holder, into one share of common stock.

SEC source: 0001214659-26-008354 · marketforms-73595.xml · derivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 400,000

Underlying: Class B Common Stock · 400,000 shares

Expires 2036-07-06

F4 · derivative.exercise_date: The option vests quarterly over a three period beginning on October 1, 2026.

SEC source: 0001214659-26-008354 · marketforms-73595.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,321,796

F1 · shares: Represents the award of time-based vesting Restricted Stock Units (RSUs).

F2 · balance_after: Includes RSUs subject to future vesting, including 600,000 shares of Class B common stock underlying RSUs. Class B common stock is not registered, as further discussed in Footnote 3 below.

F3 · balance_after: Amount includes 462,807 shares of Class B common stock, which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B common stock have identical rights to holders of common stock, except that holders of Class B common stock are entitled to 5 votes for each share held of record. Each share of Class B common stock is convertible at any time, at the option of the holder, into one share of common stock.

SEC source: 0001214659-25-010577 · marketforms-70105.xml · derivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 109,000

Underlying: Class A Common Stock · 109,000 shares

Expires 2035-07-15

F1 · derivative.exercise_date: The option vests quarterly over a three year period beginning on October 1, 2025.

SEC source: 0001214659-25-010056 · marketforms-70037.xml · derivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,219

Underlying: Class A Common Stock · 49,219 shares

Expires 2035-07-01

F1 · derivative.exercise_date: The option fully vested on the grant date of July 1, 2025.

SEC source: 0001214659-25-009326 · marketforms-69947.xml · derivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,254

Underlying: Common Stock · 71,254 shares

Expires 2035-03-04

F1 · derivative.exercise_date: The option will 100% cliff vest on July 1, 2025. The option was administratively granted on March 4, 2025 contingent on stockholder approval at the 2025 Annual Meeting of Stockholders (the "Annual Meeting"). This Form 4/A re-reports an option disclosed in a previous Form 4, filed on March 6, 2025 to (i) correct the transaction date, which was mistakenly reported as March 4, 2025 and (ii) report that the stockholder approval contingency relating to an increase in the number of shares available for awards under the Company's 2021 Incentive Award Plan (as amended and restated to date) was satisfied upon approval of the share increase at the Annual Meeting held on June 13, 2025.

SEC source: 0001214659-25-009325 · marketforms-69943.xml · derivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 184,878

Underlying: Common Stock · 184,878 shares

Expires 2035-04-11

F1 · derivative.exercise_date: The option will 100% cliff vest on July 1, 2025. The option was administratively granted on April 11, 2025 contingent on the approval by the Company's stockholders of an amendment to the Company's 2021 Incentive Award Plan (as amended and restated to date) (the "Plan") to increase the number of shares available for awards under the Plan at the 2025 Annual Meeting of Stockholders held on June 13, 2025 (the "Annual Meeting"). This stockholder approval contingency was satisfied upon approval of the share increase at the Annual Meeting.

SEC source: 0001214659-25-008011 · marketforms-69531.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 721,796

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.40 to $1.42, inclusive. The reporting person undertakes to provide to Longeveron Inc., any security holder of Longeveron Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

F2 · balance_after: Includes RSUs subject to future vesting.

F3 · balance_after: Amount includes 462,807 shares of Class B common stock, which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B common stock have identical rights to holders of common stock, except that holders of Class B common stock are entitled to 5 votes for each share held of record. Each share of Class B common stock is convertible at any time, at the option of the holder, into one share of common stock.

SEC source: 0001214659-25-004003 · marketforms-68647.xml · derivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,254

Underlying: Common Stock · 71,254 shares

Expires 2035-03-04

F1 · derivative.exercise_date: The option will 100% cliff vest on July 1, 2025, following the 2025 Annual Stockholders Meeting, wherein approval is given to increase the pool of shares available for awards under the Plan. In the event stockholder approval is not received at the 2025 meeting, then this option will not in any cirumstances vest until such time as additional shares are added to, and made available under the Second Amended and Restated 2021 Incentive Award Plan.

SEC source: 0001214659-24-014991 · marketforms-66803.xml · derivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,500

Underlying: Class A Common Stock · 6,500 shares

Expires 2034-08-15

F4 · derivative.exercise_date: The option vests quarterly over a three year period beginning on October 1, 2024.

SEC source: 0001214659-24-014991 · marketforms-66803.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 727,046

F1 · shares: Represents two time-based vesting Restricted Stock Unit (RSU) awards.

F2 · balance_after: Amount includes 462,807 shares of Class B common stock, which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B common stock have identical rights to holders of common stock, except that holders of Class B common stock are entitled to 5 votes for each share held of record. Each share of Class B common stock is convertible at any time, at the option of the holder, into one share of common stock.

F3 · balance_after: Includes RSUs subject to future vesting.

SEC source: 0001214659-24-006773 · marketforms-65541.xml · derivative · entry 4

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,553

Underlying: Class A Common Stock · 42,553 shares

Expires 2029-04-10

SEC source: 0001214659-24-006773 · marketforms-65541.xml · nonDerivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 633,280

F2 · balance_after: Amount includes 462,807 shares of Class B common stock, which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B common stock have identical rights to holders of common stock, except that holders of Class B common stock are entitled to 5 votes for each share held of record. Each share of Class B common stock is convertible at any time, at the option of the holder, into one share of common stock.

SEC source: 0001214659-24-006773 · marketforms-65541.xml · derivative · entry 3

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 106,383

Underlying: Class A Common Stock · 106,383 shares

Expires 2029-04-10

SEC source: 0001214659-24-006773 · marketforms-65541.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 590,727

F1 · balance_after: Since the date of the reporting person's last ownership report on Table I, he transferred 298,483 shares of Class B common stock to his ex-spouse pursuant to a domestic relations order. The reporting person retains voting, but not dispositive or economic rights, with respect to the shares, pursuant to the terms of a Voting Agreement. The reporting person no longer reports as beneficially owned any securities owned by his ex-spouse.

SEC source: 0001214659-23-016876 · marketforms-63918.xml · derivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,000

Underlying: Common Stock · 12,000 shares

Expires 2033-12-21

F1 · derivative.exercise_date: The option vests in four equal annual installments beginning on first anniversary of date of grant.

SEC source: 0001214659-23-012594 · marketforms-62692.xml · derivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,191,771

Underlying: Common Stock · 5,000 shares

Expires 2023-09-21

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · security: Longeveron Inc. issued to each holder of record, as of August 18, 2023, of its Class A common stock, Class B common stock and warrants exercisable for its Class A common stock, subscription rights to acquire shares of Class A common stock of Longeveron Inc. in accordance with a prospectus dated August 14, 2023. Each subscription right entitles the holder to purchase one share of Longeveron Inc. Class A common stock.

SEC source: 0001214659-23-012594 · marketforms-62692.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,828,263

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares to be received following expiration of the Longeveron Inc. Subscription Rights Offering, which is currently scheduled for September 21, 2023, unless otherwise extended by Longeveron.

F2 · balance_after: Amount includes 7,632,902 shares of Class B common stock, which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B common stock have identical rights to holders of common stock, except that holders of Class B common stock are entitled to 5 votes for each share held of record. Each share of Class B common stock is convertible at any time, at the option of the holder, into one share of common stock.

F3 · balance_after: Includes Restricted Stock Units subject to future vesting.

SEC source: 0001214659-23-012361 · marketforms-62591.xml · derivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,196,771

Underlying: Common Stock · 30,000 shares

Expires 2023-09-21

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · security: Longeveron Inc. issued to each holder of record, as of August 18, 2023, of its Class A common stock, Class B common stock and warrants exercisable for its Class A common stock, subscription rights to acquire shares of Class A common stock of Longeveron Inc. in accordance with a prospectus dated August 14, 2023. Each subscription right entitles the holder to purchase one share of Longeveron Inc. Class A common stock.

SEC source: 0001214659-23-012361 · marketforms-62591.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,823,263

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares to be received following expiration of the Longeveron Inc. Subscription Rights Offering, which is currently scheduled for September 21, 2023, unless otherwise extended by Longeveron.

F2 · balance_after: Amount includes 7,632,902 shares of Class B common stock, which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B common stock have identical rights to holders of common stock, except that holders of Class B common stock are entitled to 5 votes for each share held of record. Each share of Class B common stock is convertible at any time, at the option of the holder, into one share of common stock.

F3 · balance_after: Includes Restricted Stock Units subject to future vesting.

SEC source: 0001214659-23-012322 · marketforms-62577.xml · derivative · entry 6

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,226,771

Underlying: Class A Common Stock · 50,000 shares

Expires 2023-09-21

F1 · security: Longeveron Inc. issued to each holder of record, as of August 18, 2023, of its Class A common stock, Class B common stock and warrants exercisable for its Class A common stock, subscription rights to acquire shares of Class A common stock of Longeveron Inc. in accordance with a prospectus dated August 14, 2023. Each subscription right entitles the holder to purchase one share of Longeveron Inc. Class A common stock.

SEC source: 0001214659-23-012322 · marketforms-62577.xml · derivative · entry 5

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,276,771

Underlying: Class A Common Stock · 15,400 shares

Expires 2023-09-21

F1 · security: Longeveron Inc. issued to each holder of record, as of August 18, 2023, of its Class A common stock, Class B common stock and warrants exercisable for its Class A common stock, subscription rights to acquire shares of Class A common stock of Longeveron Inc. in accordance with a prospectus dated August 14, 2023. Each subscription right entitles the holder to purchase one share of Longeveron Inc. Class A common stock.

SEC source: 0001214659-23-012322 · marketforms-62577.xml · derivative · entry 4

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,292,171

Underlying: Class A Common Stock · 17,700 shares

Expires 2023-09-21

F1 · security: Longeveron Inc. issued to each holder of record, as of August 18, 2023, of its Class A common stock, Class B common stock and warrants exercisable for its Class A common stock, subscription rights to acquire shares of Class A common stock of Longeveron Inc. in accordance with a prospectus dated August 14, 2023. Each subscription right entitles the holder to purchase one share of Longeveron Inc. Class A common stock.

SEC source: 0001214659-23-012322 · marketforms-62577.xml · derivative · entry 3

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,309,871

Underlying: Class A Common Stock · 196,510 shares

Expires 2023-09-21

F1 · security: Longeveron Inc. issued to each holder of record, as of August 18, 2023, of its Class A common stock, Class B common stock and warrants exercisable for its Class A common stock, subscription rights to acquire shares of Class A common stock of Longeveron Inc. in accordance with a prospectus dated August 14, 2023. Each subscription right entitles the holder to purchase one share of Longeveron Inc. Class A common stock.

SEC source: 0001214659-23-012322 · marketforms-62577.xml · derivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,506,381

Underlying: Class A Common Stock · 24,924 shares

Expires 2023-09-21

F1 · security: Longeveron Inc. issued to each holder of record, as of August 18, 2023, of its Class A common stock, Class B common stock and warrants exercisable for its Class A common stock, subscription rights to acquire shares of Class A common stock of Longeveron Inc. in accordance with a prospectus dated August 14, 2023. Each subscription right entitles the holder to purchase one share of Longeveron Inc. Class A common stock.

SEC source: 0001214659-23-012322 · marketforms-62577.xml · derivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,531,305

Underlying: Class A Common Stock · 30,000 shares

Expires 2023-09-21

F1 · security: Longeveron Inc. issued to each holder of record, as of August 18, 2023, of its Class A common stock, Class B common stock and warrants exercisable for its Class A common stock, subscription rights to acquire shares of Class A common stock of Longeveron Inc. in accordance with a prospectus dated August 14, 2023. Each subscription right entitles the holder to purchase one share of Longeveron Inc. Class A common stock.

SEC source: 0001214659-23-001282 · marketforms-58429.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,793,263

F1 · shares: Pursuant to a currently effective Rule 10b5-1 Plan.

F2 · price: The trade was executed in a series of transactions with a price range of $4.13 to $4.56, inclusive. The reporting person undertakes to provide to Longeveron Inc., any security holder of Longeveron Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

F3 · balance_after: Amount includes 7,632,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F4 · balance_after: Includes Restricted Stock Units subject to future vesting.

SEC source: 0001214659-22-015253 · marketforms-57926.xml · derivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock · 5,000 shares

Expires 2032-12-21

F1 · derivative.exercise_date: The option vests in four equal annual installments beginning on first anniversary of date of grant.

SEC source: 0001214659-22-014532 · marketforms-57774.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,813,263

F1 · shares: Pursuant to a currently effective Rule 10b5-1 Plan.

F2 · price: The trade was executed in a series of transactions with a price range of $3.65 to $3.82, inclusive. The reporting person undertakes to provide to Longeveron Inc., any security holder of Longeveron Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

F3 · balance_after: Amount includes 7,652,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F4 · balance_after: Includes Restricted Stock Units subject to future vesting.

SEC source: 0001214659-22-014017 · marketforms-57585.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,861,403

F1 · shares: Restricted Stock Units, vesting in full on date of grant.

F2 · balance_after: Includes Restricted Stock Units subject to future vesting.

F3 · balance_after: Amount includes 7,672,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

SEC source: 0001214659-22-012423 · marketforms-57340.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,813,263

F1 · balance_after: Amount includes 7,672,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F2 · balance_after: Amount includes 10,780 restricted stock units subject to vesting.

SEC source: 0001214659-22-005522 · marketforms-55996.xml · nonDerivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,913,263

F1 · shares: Pursuant to a currently effective Rule 10b5-1 Plan.

F3 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F4 · balance_after: Amount includes 12,936 restricted stock units subject to vesting.

SEC source: 0001214659-22-005522 · marketforms-55996.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,913,341

F1 · shares: Pursuant to a currently effective Rule 10b5-1 Plan.

F2 · price: The trade was executed in a series of transactions with a price range of $10.00 to $10.03, inclusive. The reporting person undertakes to provide to Longeveron Inc., any security holder of Longeveron Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001214659-21-010469 · marketforms-54003.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,933,263

F1 · price: Represents the weighted average of open-market purchase transactions ranging from $3.67 to $3.70. The reporting person agrees to provide full information regarding the number of shares purchased at each separate price paid if requested by the SEC staff, the Company or a security holder of the Company.

F2 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F3 · balance_after: Amount includes 17,335 restricted stock units subject to vesting.

SEC source: 0001214659-21-010370 · marketforms-53998.xml · nonDerivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,930,763

F2 · price: Represents the weighted average of open-market purchase transactions ranging from $3.35 to $3.39. The reporting person agrees to provide full information regarding the number of shares purchased at each separate price paid if requested by the SEC staff, the Company or a security holder of the Company.

F3 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F4 · balance_after: Amount includes 17,335 restricted stock units subject to vesting.

SEC source: 0001214659-21-010370 · marketforms-53998.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,927,748

F1 · price: Represents the weighted average of open-market purchase transactions ranging from $3.35 to $3.40. The reporting person agrees to provide full information regarding the number of shares purchased at each separate price paid if requested by the SEC staff, the Company or a security holder of the Company.

F3 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

SEC source: 0001214659-21-007761 · marketforms-53460.xml · derivative · entry 3

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,000

Underlying: Common Stock · 50,000 shares

Expires 2031-07-20

F4 · derivative.exercise_date: One-eighth of Option vests July 22, 2021, with remainder to vest quarterly in equal amounts through January 22, 2025.

SEC source: 0001214659-21-007761 · marketforms-53460.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,925,763

F1 · shares: Restricted Stock Units subject to time-based vesting.

F2 · balance_after: Includes 139,861 Restricted Stock Units.

F3 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

SEC source: 0001213900-21-026415 · ownership.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,913,428

F1 · shares: Restricted Stock units subject to time-based vesting requirements.

F2 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F3 · balance_after: Includes 127,526 restricted stock units.

SEC source: 0001214659-21-002024 · marketforms-51495.xml · nonDerivative · entry 2

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,998,428

F1 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F2 · balance_after: Includes 122,526 Restricted Stock Units.

SEC source: 0001214659-21-002024 · marketforms-51495.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,997,428

F1 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F2 · balance_after: Includes 122,526 Restricted Stock Units.

SEC source: 0001213900-21-021018 · ownership.xml · nonDerivative · entry 1

Hare Joshua · CIK 0001449392 · Director · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,908,428

F1 · shares: On February 17, 2021, the reporting person filed a Form 4 that contained an administrative error reporting that 102,000 shares were purchased at $10.00 a share, the reporting person actually purchased 12,000 shares at $10.00 a share.

F2 · balance_after: Amount includes 7,772,902 shares of Class B common stock (the "Class B Common Stock"), which is not registered under the Securities Exchange Act of 1934, as amended. Holders of Class B Common Stock have identical rights to holders of common stock, except that holders of Class B Common Stock are entitled to 5 votes for each share held of record. Each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of common stock.

F3 · balance_after: Includes 122,526 Restricted Stock Units.